7687664613 has 32 divisors (see below), whose sum is σ = 12055680000. Its totient is φ = 4828184496.

The previous prime is 7687664599. The next prime is 7687664617. The reversal of 7687664613 is 3164667867.

It is not a de Polignac number, because 7687664613 - 2⁵ = 7687664581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7687664613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7687664617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49968 + ... + 133686.

It is an arithmetic number, because the mean of its divisors is an integer number (376740000).

Almost surely, 2^7687664613 is an apocalyptic number.

It is an amenable number.

7687664613 is a deficient number, since it is larger than the sum of its proper divisors (4368015387).

7687664613 is a wasteful number, since it uses less digits than its factorization.

7687664613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83926 (or 83920 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 7687664613 is about 87679.3283106115. The cubic root of 7687664613 is about 1973.6257801720.

The spelling of 7687664613 in words is "seven billion, six hundred eighty-seven million, six hundred sixty-four thousand, six hundred thirteen".